Well-Defined Amidate-Functionalized N-Heterocyclic Carbene -Supported Rare-Earth Metal Complexes as Catalysts for Efficient Hydroboration of Unactivated Imines and Nitriles
作者:Zeming Huang、Shaowu Wang、Xiancui Zhu、Qingbing Yuan、Yun Wei、Shuangliu Zhou、Xiaolong Mu
DOI:10.1021/acs.inorgchem.8b02067
日期:2018.12.17
unactivated imines and nitriles were investigated, and it was found that these complexes displayed excellent activities as well as remarkable functional group compatibility for imine and nitrile substrates such as halo-, alkyl-, hydroxyl-, N,N-dimethylamino-, and nitro- substituents. Among those, the chemoselectivity for this reaction among the common unsaturated functional groups was achieved in the order
四酰胺化物官能化的N-杂环卡宾(NHC)稀土类金属酰氨基配合物[(κ 2 -N,O-κ 1 -大号)2 REN(森达3)2 ](大号= 1-(C 6 H ^ 5 Ç ═ONCH 2 CH 2)-3-(CH 3)3 c ^ 6 ħ 2(N(CH)2 NC))[RE =尔(1),Y(2),镝(3),钆(4)]由2当量(1-(C中的一个一锅反应合成6 ħ 5 C═ONHCH2 CH 2)-3-(CH 3)3 C 6 H 2-(N(CH)2 NCH))Br(H 2 L Br)与5当量的KN(SiMe 3)3,然后用1当量的KN(SiMe 3)3处理在-40°C下于四氢呋喃中的RECl 3。对这些配合物进行了充分表征,并研究了它们对未活化的亚胺和腈进行硼氢化的催化活性,发现这些配合物对亚胺和腈底物(如卤代,烷基,羟基,氮,氮-二甲基氨基和硝基取代基。其中,在当前的催化体系中,常见的不饱和官能团之间对